the horizontal movement of air from an area of high pressure to an area of low pressure
a device to measure wind speed
an increased cooling a wind can cause
winds that blow over short distances
local wind that blows in from an ocean or lake. - land heats up faster that water - during the day, the warmer air over the land rises and the cooler air from the water moves in.
local wind that blows from land to water - at night, the land cools faster that the water and the warmer air over the water rises and the cooler air from the land moves in
winds that blow steadily from specific directions over long distances
global convection currents
temperature differences from the equator and the poles produce giant convection currents. warm air rises at the equator and sinks at the poles
the corilois effect
the way the earth's rotation causes the winds to curve - winds in the northern hemisphere turn right. in the southern hemisphere the winds turn to the left
near the equator - the sun is strong. warm air rises and cool air moves in but heats so rapidly there is very little horizontal motion
at 30 degrees north and south of the equator, the air stops moving from the equator to the poles and a calm belt is formed
winds between 0 and 30 north of the equator blow from the northeast. winds between 0 and 30 south of the equator blow from the southeast. *because of the corilois effect.
between 30 and 60 north and south of the equator, winds blowing toward the poles are turned east by the corilois effect. (blow from west to east = westerlies)
* they blow from the southwest in the northern latitudes
*they blow from the northwest in southern latitudes
cold air traveling from the poles (easterlies) meet the westerlies at 60 north and south of the equator along a region called the polar front
about 10 kilometers above the earth's surface are bands of high speed winds.
generally blow from west to east.